Using login alias in Membership Provider

Our user directly allows authentication with "short names". For example,
the user "Joe Cool/Acme" can log in with the user id "jcool".

In implementing an ASP.NET Membership Provider, we can not figure out how to
supply the real user name (used in access control settings, etc.) when users
log in using just the short name. It seems like the ValidateUser method
should provide a way to supply the real name in addition to just returning
true or false. Are we missing something?

Thanks!


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